Sash-lock.



T. J. EL$TON.

SASH LOCK.

APPLICATION FILED MAR.5,1913.

1,069,230 Patented Apr. 29, 1913.

Witnesses Inventor Attorneys THOMAS J'. ELSTON, 0F BEDFORD, INDIANA.

SASH-LOCK.

Specification of Letters latent.

Patented Apr. 29, 1913.

Application filed March 5, 1913. Serial No. 752,243.

This invention relates to an improved form of sash lock.

An object of the present invention is to provide an improved form of sash lock whereby a lock is secured to the upper por-. tion of the lower sash and is adapted to engage an apertured plate secured to the window frame and also to engage an apertured plate secured to the upper sash.

With the foregoing and other objects in View which will appear as the description proceeds, the invention resides in the combination and arrangement of parts and in the details of construction hereinafter described and claimed, it being understood that changes in the precise embodiment of the invention herein disclosed, can be made within the scope of what is claimed, without departing from the spirit of the invention.

In the drawings accompanying this specification and forming a part thereof, the

preferable form of my invention is illustrated, in which Figure l is a view in perspective illustrating a portion of a window frame and sashes with my improved sash lock secured thereto. Fig. 2 is a bottom plan view of my improved lock. Fig. 3 is a cross sectional view, showing the manner in which the lock is constructed. Fig. 4 is a view illustrating the openings through which the sash bolts extend.

Referring to the d awings in which similar reference numerals designate corresponding parts throughout the several views, 1 designates the lower sash and 2 the upper sash, the window frame being generally designated by the numeral 3. The window frame 3 is provided with an apertured late 4 preferably recessed or counter sunk t erein with which my improved sash lock secured to the upper portion of the sash 1 is adapted to engage. In order that the sashes 1 and 2 may be locked against relative movement, an apertured plate 5 is counter sunk or recessed Within the upper sash 2 and with which my improved sash lock is also adapted to engage.

The improved form of look as illustrated in Figs. 2, 3 and 1 of the drawings and which constitutes my invention comprises an integral body portion 6 preferably stamped from sheet metal and provided with a number of apertures in the top thereof through which extend the retaining screws 7 by which the casing 6 is rigidly secured to the upper portion of a lower sash 1. Thecasingti is rectangular in outline in order to conform with the general-contour of the sash 1 and is provided with an aperture 8 in the front face thereof, the said aperture comprising a circular portion and a restricted passage extending therefrom the entire aperture being keyhole in outline as illustrated in Fig. 4. A sash bolt 9 rotatably engages the said aperture 8 and an aperture 10 which is in alinement therewith and through which the said bolt 9 extends. Said bolt 9 is provided intermediate of its ends with a peripheral groove 11 which is rotatably engaged by the spring 12. A peripheral groove being necessary in order that the bolt may be readily inserted in position in the casing apertures.

Secured to the bolt 9 is a collar 13 which is assembled upon the bolt after one end thereof has been inserted through the side wall of the casing 6 after which it is rigidly secured in place by a pin or other equivalent means. A key 14 is secured to the bolt 9 and extends longitudinally thereof, the said key being of a size such as to fit snugly within the restricted portion of the aperture 8 and the said key stops short of a knob 15 rigidly secured to the outer extremity of the said bolt 9. From this it will be apparent that the bolt 9 will be forced inward by means of the resilient spring 12, .it being noted that the end of the spring 12 is bifurcated as shown in Fig. 8, the bifurcations fitting within the peripheral grooves 11 to thereby resiliently and rotatably engage the sash bolt 9, and that the inner extremity of as said bolt will engage one of the apertures formed in the plate 5 to thereby securely lock the sashes 1 and 2 against relative movement By reason of the collar 13 provision is made whereby the knob 15 may be gripped and the sash bolt pulled outward until the said collar contacts with the inner wall of the casing at which time the key 14 will be withdrawn from the restricted portion of the aperture 8 and the bolt may then be rotated about a longitudinal axis which brings the key 14 out of alinement wit-h the said restricted portion of the aperture and upon the releasing of the knob the bolt is held against moving inward by reason of the key 14: contacting with the side walls of the aperture 8 which allows the relative movement of the sashes l and 2. In order to provide means forlocking the lower sash 1 to the window frame a bolt is provided extending longitudinally of the casing 6 and the construction of which including a peripheral groove, collar and knob is identical with the structure just described for the bolt extending transversely of the casing.

From the foregoing it will be apparent that I have devised an improved form of lock for locking a sash against movement relative to a window frame and also a lock which is adapted to lock the upper and lower sashes of a window against relative movement. Furthermore the said improved construction embodies an improved form of bolt whereby the same may be gripped and drawn outwardly until no further longitudinal movement thereof is possible and by a suitable rotating thereof the bolt Willbe drawn and held from engagement and will be maintained in this position until such time that the bolt is further rotated to bring the key secured thereto in alinement with a restricted portion of an aperture through which the bolt extends. The inward movement of the bolt is limited by the flat portion of the gripping knob 15 as will be readily apparent.

Having thus fully described the inven tion, what I claim to be new and original with me is A sash lock for looking the lower sash against movement with respect to the window frame and for locking the upper and lower sashes against relative movement, comprising a casing, sash bolts extending transversely and longitudinally thereof, said sash bolts extending through apertures formed in said casing, two of said apertures substantially keyhole shape in outline, said bolts provided with peripheral grooves intermediate their ends, springs rotatably engaging said peripheral grooves, collars secured to said bolts adapted to limit the movement thereof in one direction, knobs rigidly secured to the outer extremities of said bolts adapted to limit the movement thereof in the opposite direction, a key rigidly secured to said bolts adapted to engage the restricted portion of said keyhole shaped openings, and said keys adapted to prevent the longitudinal movement of said bolts when said keys are out of alinement with said restricted portion. V

In testimony that I claim the foregoing as my own, I have hereto aflixed my signature in the presence of two witnesses.

THOMAS J. ELSTON. Witnesses:

JAMES D. MARTIN, CHARLES S. JACKSON. 

